Lug for tractor wheels



April 29, 1941. D ERRETT 2,240,092

. LUG IfOR TRACTOR WHEELS Filed May 27, 1939 2 Shets-Sheet 1 InventorUav/ F/"am [$4 Ere/f By it zem i A iiorneys April 29, 1941. D. ERRETT weFOR TRACTOR WHEELS Filed May 2' 7, 1939 2 Sheets-Sheet 2 O A [/3 m AInventor Da w'a Hank/m Errefl A iiorneys Patented Apr. 29, 1941 UNHTEDSTATES PATENT QFFEQE LUG FOR. TRACTOR WHEELS David Franklin Errett,Weston, Ohio Application May 27, 1939, Serial No. 276,200

1 Claim.

This invention relates to anti-skid lugs for tractor wheels, the generalobject of the invention being to provide means whereby the lugs can beprojected through the rim of the wheel when they are needed to preventthe wheels from slipping or they can be retracted when not needed.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:

Figure 1 is an elevation of a wheel provided with the invention.

Figure 2 is a section on the line 2--2 of Figure 1.

Figure 3 is a view of the slotted sleeve which surrounds the hub of thewheel.

Figure 4 is a perspective view of the operating lever and the ringsconnected therewith.

In these views the letter A indicates a tractor wheel which includes therim I, the hub 2 and the spokes 3, the hub being rotatably arranged on aspindle or shaft 4 of the tractor.

Holes 5 are formed in the rim for the passage of the lugs 6 and each lugis pivotally arranged at its inner end in a yoke to the bight of whichis connected a rod or link 8, the inner ends of these links beingpivoted between the ears 9 on a sleeve III which fits over the hub 2 andhas longitudinally extending slots II therein through which the spokes 3pass. The inner end of the sleeve is formed with an annular groove I2 inwhich is located a ring l3 which is connected by links I4 with a leverI5 pivoted to a collar I6 which is clamped to a part of the shaft 4, asshown in Figure 2.

Thus it will be seen that by moving the lever toward the wheel in Figure2 the sleeve III will be moved to a position where the links or rods 8will project the lugs from the wheel so that said lugs will prevent thewheel from slipping in mud, snow or the like. Then when the wheel isrunning on hard surfaces, the lever I5 is moved in the oppositedirection which will cause the sleeve to move the links 8 inwardly andthus retract the lugs so that said lugs will not project from the outercircumference of the rims. Of course, by providing the collar I3 fittingin the groove I2 the sleeve can rotate with the hub as the ring l3 willsimply rotate in the groove I2. Ring I3 i made of two sections, as shownin Figure 4, and split bolts I8 extend outwardly from the ends of thesesections, one half of each bolt being connected to the end of onesection and the other half of the bolt to the adjacent end of the othersection and these bolts pass through holes in the links I4 and receivethe nuts l9 so that these nuts connect the links with the ring l3 andalso act to hold the two parts of the bolts together and thus hold thetwo sections of ring l3 with their ends abutting as shown in Figure 4.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts provided thatsuch changes fall within the scope of the appended claim.

Having described the claimed as new is:

In a wheel including a rim, a hub and spokes connecting the rim with thehub, lugs passing through holes in the rim, a yoke fitting over theinner end of each lug and pivotally connected thereto, a rod having itsouter end connected with each yoke, a sleeve slidably arranged on thehub and having longitudinally extending slots therein through which theinner ends of the spokes pass, said slots passing through the invention,what is 'front end of the sleeve and terminating adjacent the center ofthe sleeve, means for pivotally connecting the inner ends of the rods tothe sleeve and means for moving the sleeve longitudinally on the hub, tocause the rods to retract or project the lugs, said sleeve holding thelugs in projected position when the inner walls of the slots engage thespokes.

DAVID FRANKLIN ERRETT.

